title: Evaluation of efficacy of different gingival displacement materials on gingival sulcus width.
abstract: OBJECTIVE
  The purpose of the present in vivo study was to measure the efficacy of different gingival displacement materials in achieving gingival tissue displacement and to compare the efficacy of Expasyl displacement paste (Pierre Rolland, France) and gingival displacement cord for gingival displacement.
  
  
  METHODS
  Sixteen subjects were included in the study. Premolars were prepared to receive full veneer crown, gingival displacement was carried using gingival retraction cord and gingival displacement paste. Impression of the gingival sulcus was made. Sulcus width after displacement was measured under magnification.
  
  
  RESULTS
  The mean displacement value of sulcus width was 0.21 ± 0.01 mm for the gingival retraction cord and 0.26 ± 0.02 mm for the gingival displacement paste. 'F' test was used for statistical analysis. Difference among the two test agents was statistically significant (p < 0.01).
  
  
  CONCLUSIONS
  Gingival displacement paste showed better response in achieving horizontal displacement of the gingival sulcus than gingival retraction cord.
  
  
  CONCLUSIONS
  Gingival displacement helps in recording the unprepared tooth surface adjacent to the finish line in the impression being made, thereby helping a better marginal adaptation and emergence profile in the extracoronal restoration.
authors.affiliation: Department of Prosthodontics, Sri Hasanamba Dental College and Hospital, Hassan, Karnataka, India. renukaprasannags@yahoo.co.in
authors.forename: G S Renuka
authors.initials: GS
authors.lastname: Prasanna
authors.forename: Kesava
authors.initials: K
authors.lastname: Reddy
authors.forename: R K Naveen
authors.initials: RK
authors.lastname: Kumar
authors.forename: S
authors.initials: S
authors.lastname: Shivaprakash
mesh_terms: D000077410:Aluminum Chloride; D017607:Aluminum Compounds / Q000627:therapeutic use; D001252:Astringents / Q000627:therapeutic use; D001641:Bicuspid / Q000033:anatomy & histology; D002712:Chlorides / Q000627:therapeutic use; D003442:Crowns; D003760:Dental Impression Materials / Q000737:chemistry; D003761:Dental Impression Technique; D003801:Dental Veneers; D005290:Ferric Compounds / Q000627:therapeutic use; D005881:Gingiva / Q000033:anatomy & histology*; D060745:Gingival Retraction Techniques / Q000295:instrumentation*; D006490:Hemostatics / Q000627:therapeutic use; D006801:Humans; D007616:Kaolin / Q000627:therapeutic use; D009824:Ointments / Q000737:chemistry; D011145:Polyvinyls / Q000737:chemistry; D012833:Siloxanes / Q000737:chemistry; D019231:Tooth Preparation, Prosthodontic / Q000379:methods
chemical_list: D017607:Aluminum Compounds; D001252:Astringents; D002712:Chlorides; D003760:Dental Impression Materials; D005290:Ferric Compounds; D006490:Hemostatics; D009824:Ointments; D011145:Polyvinyls; D012833:Siloxanes; C034183:vinyl polysiloxane; D007616:Kaolin; D000077410:Aluminum Chloride; C024823:ferric sulfate